Ill. Admin. Code tit. 23, § 475.40
b) The Notice of Opportunity for Hearing shall include:
A) a short and plain statement of the material allegations asserted,
2) The legal authority and jurisdiction under which the hearing is to be held;
1) served in person; or
e) If a licensee receiving a Notice of Opportunity for Hearing wishes to request a hearing, then he or she must file a written request for hearing within 10 days after receipt.